General Information:
Chemical Formula:NaCaY(F,Cl)6
Composition:(Molecular Weight = 450.18 gm)Sodium 5.11 %
NaCalcium 8.90 %
CaYttrium 19.75 %
Y Chlorine 47.25 %
ClFluorine 18.99 %
F Empirical Formula: NaCaYF4.5Cl6
IMA Status:Approved IMA 1987
Physical Properties: Cleavage:[???] Good
Color:yellow, cream white, light brown, or pink.
Density:4.21
Diaphaniety:Transparent
Hardness:4.5 - Between Fluorite and Apatite
Luster:Vitreous - Dull
Streak:white
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